Climate averages 1991–2020

Arecibo weather
in July.

A hot, moderately wet month: one of the warmest and the 5th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 31.7°C Daytime mean, July

Average low 24.6°C Night-time mean, July

Rainfall 79 mm 15 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

July is a hot month in Arecibo: daytime highs average 31.7°C and nights cool to about 24.6°C. By daytime temperature it is one of the warmest months of the year.

Expect about 79 mm of rain on roughly 15 days, which makes July a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 07 min on an average July day.

The nearest other city in this atlas is Ponce (52 km away). In July its highs average 30.6°C, 1.2°C cooler than Arecibo, with 55 mm of rain.

Among the 7 cities listed in Puerto Rico, Arecibo ranks 1st of 7 for the warmest July highs and 4th of 7 for the driest July (rainfall, lowest first). The mean July high of those 7 cities is 31.1°C; Arecibo is 0.6°C warmer than that mean.

From July to August, average highs stay level at 31.7°C, and monthly rainfall rises from 79 mm to 101 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Arecibo climate table

1991–2020

Monthly climate averages for Arecibo, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	28.3°C21.5°C	21.5°C	41	9.5	11.211 h
February	29.0°C21.3°C	21.3°C	37	8.2	11.512 h
March	29.6°C21.4°C	21.4°C	59	9.9	12.012 h
April	29.9°C22.2°C	22.2°C	107	13.7	12.613 h
May	30.4°C23.3°C	23.3°C	165	18.3	13.013 h
June	31.5°C24.3°C	24.3°C	92	13.8	13.213 h
July, selected	31.7°C24.6°C	24.6°C	79	14.8	13.113 h
August	31.7°C24.7°C	24.7°C	101	19.6	12.813 h
September	31.2°C24.4°C	24.4°C	154	22.3	12.312 h
October	30.4°C24.0°C	24.0°C	138	21.3	11.712 h
November	28.9°C23.1°C	23.1°C	113	17.4	11.311 h
December	28.3°C22.1°C	22.1°C	48	11.4	11.011 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Arecibo

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Arecibo) is explained once on the Arecibo year overview and on the Sources, method and limits page.